The U.S. government is taking proactive measures to protect livestock from a serious threat by investing $8.5 million in a fly-breeding facility near the U.S.-Mexico border. This facility, located at Moore Air Base in Texas, aims to combat the New World screwworm, a parasitic insect that poses significant risks to livestock health and the agricultural economy.
The innovative plan involves producing millions of sterile male New World screwworm flies. When released into the wild, these sterile males will mate with wild females, curbing their population and decreasing the chances of larvae outbreaks. The larvae can cause severe damage by burrowing into the tissue of animals, leading to painful infections and even death.
This facility represents a crucial step in an ongoing battle against the screwworm, which was successfully eradicated from the U.S. decades ago using a method known as the Sterile Insect Technique (SIT). Unfortunately, recent detections of the screwworm in Mexico—close to the U.S. border—have prompted heightened vigilance among agricultural officials. As a precaution, the government recently put a temporary halt on imports of cattle, horses, and bison from certain areas along the border.
To strengthen their efforts further, the U.S. Department of Agriculture (USDA) is considering the establishment of a second breeding facility at the Texas site. This additional facility could produce up to 300 million sterile flies each week, vastly increasing their response capabilities. Additionally, the USDA plans to allocate another $21 million to upgrade an existing facility near the Texas-Mexico border to further support fly production, although this site is not projected to be operational until the end of 2026.
U.S. Secretary of Agriculture Brooke Rollins emphasized the significance of this initiative, stating, “The United States has defeated New World screwworm before, and we will do it again.” She acknowledged the threats posed to the agricultural industry, economy, and food supply chain and stressed the need for urgent action.
Historically, the United States has successfully managed screwworm populations. After their eradication in 1966, the country enjoyed decades without their presence. However, a brief re-emergence occurred in the Florida Keys from 2016 to 2017, reminding officials that the threat is always present.
Mexican authorities are optimistic about resuming exports of cattle, relying on cooperation with U.S. officials to mitigate the risk of spreading the screwworm. Mexico’s Agriculture Secretary, Julio Berdegué, expressed his confidence in restarting exports soon, underscoring the importance of collaborative measures to protect livestock in both countries.
Beyond the immediate concerns for livestock, the New World screwworm is also known to affect household pets and, in rare cases, humans. This fact highlights the broader implications of managing these fly populations effectively.
Surrounding nations, such as Cuba, Haiti, and the Dominican Republic, represent significant reservoirs for the screwworm, making it even more critical for the U.S. to maintain strict control along its borders. The interconnection of agriculture across borders necessitates a vigilant and cooperative approach.
This initiative to combat the New World screwworm illustrates a commitment to preserving American agriculture and the economy. By investing in innovative solutions and taking decisive action, the U.S. government aims to safeguard the livestock industry and ensure a stable food supply for its citizens.
In an era of increasing challenges in agriculture and biosecurity, this proactive approach is a welcome reminder that America can effectively tackle threats when united in purpose. The investment in the fly-breeding facility is but one step in a larger effort to maintain the integrity of American farming practices and protect a vital part of the nation’s economy.


